Arguments in argumentative essays usually appear in the form of statements or affirmative sentences. It is a clear view and position on the issue under discussion, which usually appears at the beginning or end of an article or paragraph. The following are common sentence patterns of some arguments:

1. declarative sentence: this sentence directly expresses the author's views or opinions, and usually begins with words such as "I think", "I believe" and "I advocate".

For example, "I think education is the key to social progress."

2. Affirmative sentence: This kind of sentence usually begins with words such as "yes", "should" and "must" to emphasize the correctness or necessity of a certain viewpoint or position.

For example, "everyone should have the right to receive education."

3. Questions: Although questions are not usually used as the main argument, in some cases, the author may use questions to guide readers to think about a problem or stimulate readers' interest.

For example, "How can we effectively reduce the pressure on students?"

4. Negative sentence: This kind of sentence usually begins with words such as "no", "shouldn't" and "can't" to refute the mistake or irrationality of a certain viewpoint or position.

For example, "We shouldn't discriminate against a person just because of his race."

It should be noted that the specific expression of the argument may be different because of the different content of the article and the author's writing style.